Leak source specification assistance device, leak source specification assistance method, and leak source specification assistance program

Abstract

A leak source specification assistance device includes a processing unit that performs processing, based on a movement of a first pixel that is one of pixels constituting an image including a leaking fluid region (gas region), to determine a second pixel that is one of the pixels constituting the image and is a movement source pixel of the first pixel, and repeats the processing with the second pixel newly set as the first pixel to determine a final movement source pixel. The processing unit repeats the processing on each of a plurality of the pixels constituting the image to determine the final movement source pixel for each of the plurality of pixels.

The invention claimed is: 
     
       1. A leak source specification assistance device, comprising a hardware processor that performs processing, based on a movement of a first pixel that is one of pixels constituting an image including a leaking fluid region, to determine a second pixel that is one of the pixels constituting the image and is a movement source pixel of the first pixel, and repeats the processing with the second pixel newly set as the first pixel to determine a final movement source pixel,
 wherein the hardware processor repeats the processing on each of a plurality of the pixels constituting the image to determine the final movement source pixel for each of the plurality of pixels; 
 wherein the hardware processor determines that two or more of the pixels located within a predetermined angle range with respect to an axis indicating a direction opposite to a direction of the movement of the first pixel are candidates for the second pixel, and determines the second pixel from among the candidates. 
 
     
     
       2. The leak source specification assistance device according to  claim 1 , wherein the predetermined angle range is a range of ±90 degrees with respect to the axis. 
     
     
       3. The leak source specification assistance device according to  claim 1 , wherein the hardware processor determines that one of the candidates located at a position where an angle with respect to the axis is the smallest is the second pixel. 
     
     
       4. The leak source specification assistance device according to  claim 1 , wherein the hardware processor excludes, among the candidates, the candidate(s) located outside the leaking fluid region from the candidates. 
     
     
       5. The leak source specification assistance device according to  claim 4 , wherein when all of the candidates are located outside the leaking fluid region, the hardware processor determines that the first pixel used to determine the candidates is the final movement source pixel. 
     
     
       6. The leak source specification assistance device according to  claim 1 , wherein when an amount of the movement of the first pixel is smaller than a predetermined threshold value, the hardware processor determines that the first pixel is the final movement source pixel. 
     
     
       7. The leak source specification assistance device according to  claim 1 , wherein the plurality of pixels constituting the image is all pixels constituting the leaking fluid region. 
     
     
       8. The leak source specification assistance device according to  claim 1 , wherein the hardware processor estimates that among the respective final movement source pixels of the plurality of pixels constituting the image, the most frequent final movement source pixel is the location of a leak source. 
     
     
       9. The leak source specification assistance device according to  claim 8 , wherein
 the hardware processor performs the determination of the final movement source pixel for each of the plurality of pixels constituting the image, on each of a plurality of the images showing movements of the pixels at different times, and 
 the hardware processor estimates that the most frequent final movement source pixel among the final movement source pixels obtained for each of the plurality of images is the location of the leak source. 
 
     
     
       10. A leak source specification assistance method, comprising performing processing, based on a movement of a first pixel that is one of pixels constituting an image including a leaking fluid region, to determine a second pixel that is one of the pixels constituting the image and is a movement source pixel of the first pixel, and repeating the processing with the second pixel newly set as the first pixel to determine a final movement source pixel,
 wherein in the performing processing, the processing is repeated on each of a plurality of the pixels constituting the image to determine the final movement source pixel for each of the plurality of pixels; 
 wherein the processing determines that two or more of the pixels located within a predetermined angle range with respect to an axis indicating a direction opposite to a direction of the movement of the first pixel are candidates for the second pixel, and determines the second pixel from among the candidates. 
 
     
     
       11. A non-transitory recording medium storing a computer readable leak source specification assistance program that causes a computer to execute a-performing processing, based on a movement of a first pixel that is one of pixels constituting an image including a leaking fluid region, to determine a second pixel that is one of the pixels constituting the image and is a movement source pixel of the first pixel, and repeating the processing with the second pixel newly set as the first pixel to determine a final movement source pixel,
 wherein in the performing processing, the processing is repeated on each of a plurality of the pixels constituting the image to determine the final movement source pixel for each of the plurality of pixels; 
 wherein the processing determines that two or more of the pixels located within a predetermined angle range with respect to an axis indicating a direction opposite to a direction of the movement of the first pixel are candidates for the second pixel, and determines the second pixel from among the candidates. 
 
     
     
       12. The leak source specification assistance device according to  claim 1 , wherein when an amount of the movement of the first pixel is smaller than a predetermined threshold value, the hardware processor determines that the first pixel is the final movement source pixel. 
     
     
       13. The leak source specification assistance device according to  claim 1 , wherein the plurality of pixels constituting the image is all pixels constituting the leaking fluid region. 
     
     
       14. The leak source specification assistance device according to  claim 1 , wherein the hardware processor estimates that among the respective final movement source pixels of the plurality of pixels constituting the image, the most frequent final movement source pixel is the location of a leak source. 
     
     
       15. The leak source specification assistance device according to  claim 2 , wherein the hardware processor determines that one of the candidates located at a position where an angle with respect to the axis is the smallest is the second pixel. 
     
     
       16. The leak source specification assistance device according to  claim 2 , wherein the hardware processor excludes, among the candidates, the candidate(s) located outside the leaking fluid region from the candidates. 
     
     
       17. The leak source specification assistance device according to  claim 2 , wherein when an amount of the movement of the first pixel is smaller than a predetermined threshold value, the hardware processor determines that the first pixel is the final movement source pixel. 
     
     
       18. The leak source specification assistance device according to  claim 2 , wherein the plurality of pixels constituting the image is all pixels constituting the leaking fluid region. 
     
     
       19. The leak source specification assistance device according to  claim 2 , wherein the hardware processor estimates that among the respective final movement source pixels of the plurality of pixels constituting the image, the most frequent final movement source pixel is the location of a leak source.